Motor unit of hand blender

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional hand blenders experience noise, vibration, power loss, and premature failure due to tolerances between the motor and tool units, which are exacerbated by the design of separable elements.

Innovation Solution

The tool unit is directly coupled to the motor unit via a motor unit coupling part that includes an alignment zone for guiding and aligning, a fixating zone for secure positioning, and a locking zone for axial fixation, reducing radial and tangential tolerances and incorporating a sealing zone to prevent foreign material entry.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If separable elements (Motorfront and Zwischengehäuse) are used between motor and tool, then assembly flexibility is improved, but tolerance accumulation increases leading to noise, vibration and power loss

Engineering Contradiction:

Improveassembly flexibilityVSAvoidtolerance accumulation

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent merges the Motorfront and Zwischengehäuse into a single integrated end part structure. This integration eliminates the additional interface and tolerance accumulation that occurred with separable elements, while preserving the alignment and fixation functions through integrated features such as the alignment zone with guiding surfaces and the fixation zone with retaining elements.

Inventive Principle:

Principle #5Merging (Combining)

2Adaptability or versatility

If multiple separable elements are used for coupling, then adaptability is improved, but device complexity increases

Engineering Contradiction:

Improvecoupling adaptabilityVSAvoidnumber of coupling elements

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The end part is designed as a universal coupling component that integrates multiple functions: alignment zone for guiding and positioning, fixation zone for securing the tool unit, and locking zone for preventing axial release. This multi-functional integration reduces the number of separate coupling elements needed while maintaining adaptability for different tool units.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Manufacturing precision

If alignment zone is positioned in motor unit coupling part, then radial tolerance is reduced, but manufacturing complexity increases

Engineering Contradiction:

Improveradial alignment precisionVSAvoidmanufacturing complexity

Core Design Contradiction:

Manufacturing precisionVSEase of manufacture

Solution Approach 1:

The alignment zone is built into the motor unit coupling part as a pre-formed structural feature with guiding surfaces. This preliminary alignment structure is manufactured as an integral part of the end part, automatically guiding the tool unit shaft into correct radial and axial positioning during assembly, thereby achieving high alignment precision without requiring additional adjustment operations.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentEP3013200B1Motor unit of hand blender

Publication Date: 2021.01.13 KONINKLIJKE PHILIPS NV

Figure 1A
Figure 1B
Figure 2

AI summary

The motor unit (2) comprises a motor unit coupling part (22) for coupling a tool unit (3) to the motor unit. The tool unit will be coupled onto the motor unit via the motor unit's motor unit coupling part and the tool unit's tool unit coupling part. Coupling of the tool unit directly onto the end part of motor (20) reduces the tolerance along the longitudinal axis of the motor unit. Reduction of tolerance is advantageous as it reduces vibration and noise and as it reduces the load on the coupling parts.